Degradation of Polyaniline Electrochemically at Graphite Electrodes
CHEN Yin-Ying1, WANG Ji-Xiao2, XU Qiang1
1. Department of Applied Chemistry, School of Chemical Engineering and Technology, Tianjin ；2. Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University
摘要 使用循环伏安法（CV）和恒电位法研究了聚苯胺(PANI)在石墨电极上的降解行为。试验结果表明，电极上施加的电位和测试温度对PANI降解有较大的影响。当电极电位低于0.60 V vs SCE时，聚苯胺的降解过程是一个线性过程；当电极电位高于0.60 V vs SCE时，聚苯胺的降解过程是一个指数衰减的非线性过程。同样，测试温度的提高使PANI降解速率增加并遵循指数衰减的非线性关系。
Abstract：
Polyaniline (PANI) thin film at graphite electrode was prepared by drying PANI NMP solution under vacuum condition. The modified electrode obtained was characterization by cyclic voltammetric（CV）and potentiostatic method in 1.0 M H2SO4 solution. The degradation process of PANI was found to be greatly dependent on the applied potential and the experimental temperature. When the applied potentials are lower than 0.60 V vs SCE, the degradation of PANI follows a linear process, while the applied potentials are higher than 0.60 V vs SCE, the degradation of PANI follows exponential decay nonlinear process. Much the same as above, an increase of testing temperature can also make the PANI degradation to follow exponential decay relation from first order to third order successively.
CHEN Yin-Ying, WANG Ji-Xiao, XU Qiang.Degradation of Polyaniline Electrochemically at Graphite Electrodes[J]. Chemcial Industry and Engineering, 2013,30(1): 27-30
2013, Vol. 30 
